package com.wugui.datax.rpc.remoting.net.impl.netty.codec;

import com.wugui.datax.rpc.serialize.Serializer;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToByteEncoder;

/**
 * encoder
 *
 * @author xuxueli 2015-10-29 19:43:00
 */
public class NettyEncoder extends MessageToByteEncoder<Object> {

  private final Class<?> genericClass;
  private final Serializer serializer;

  public NettyEncoder(Class<?> genericClass, final Serializer serializer) {
    this.genericClass = genericClass;
    this.serializer = serializer;
  }

  @Override
  public void encode(ChannelHandlerContext ctx, Object in, ByteBuf out) {
    if (genericClass.isInstance(in)) {
      byte[] data = serializer.serialize(in);
      out.writeInt(data.length);
      out.writeBytes(data);
    }
  }
}
